Cut-off tool



STATES ATENT rricn.,

HANS C.V ZEIINERT AND ARTHUR E. ZEUNER'I, OF CHICAGO, ILLINOIS.

CUT-OFF TOOL.

SPECIFICATION forming part of Letters Eatent No. 550,671, dated December 3, 1895.

` Appiieation mediana 20,1395.` serial No. 542,539. (No model.)

To all whom it 'may concern:

Be it known that we, HANS OfZEUNERT and ARTHUR E. ZEUNERT, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Out-Off Tools; and we do declare the following to be a full, clear, and exact description of Vthe invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a cutting-off tool to be used on metal-working machines generallysuch as lathes, shapers,planers, and the like; and, among other things, ithas for its objects to provide, at a minimum eXpense,an effective means for moving or adjusting the blade laterally, so as to present a square cutting-surface; to. so construct the sheath or blade holder that it may be clamped upon the bladeby the manipulation of a screw or screws, so that said blade may be firmly secured in its seat and quickly adjusted, removed, and replaced in the holder without altering or changing the position of any of the parts, and which is highly advantageous in sharpening the blade; to so construct and combine the parts that the tool can be brought in close proximity to the chuck of a lathe or the like, which is an important desideratum, and, finally, to produce the tool as a whole at a comparatively Y 3 is a cross-seotional viewftaken in the plane indicated by the dotted line y y on Fig, l. Fig. 4 is a perspective view of the blade' sheath or holder removed, and Fig. 5 is a perspective view of the sleeve-nut removed from the feed-screw, p j

is here shown for the purpose of better illustrating my improvements.

The stock A is provided in its side, opposite the arm a, with a longitudinal slot or opening b for the reception of the sheath or blade-holder D. The top wall c of this slot or opening is provided with two screw-tapped apertures d to receive headed bolts or screws E, which are designed to engage the sheath or blade-holder, as will be presently described. In the vertical side wall of the stock we also provide two screw-tapped apertures c for the reception of screws f, which engage one side of the blade-holder D, and preferably near the base thereof.

The sheath or blade-holder D may be of a general elongated rectangular form in outline and is bored out centrally and lon gitudinally, as shown atg, for the reception of the feed-screw F, and this bored-out portion is split in its outer wall throughout its length, as shown at h, for a purpose presently described. Said sheath or blade-holder D is also recessed longitudinally, as shown at i, and in the top and bottom walls j la of this recess are formed grooves l, designed and adapted to receive the blade G, as shown in Figs. l and 3 of the drawings.

As better shown in Fig. 2, the feed-screw F is provided at one end with a head m, designed to engage the forward end of the sheath or blade-holder D and with a plain or smooth portion n, designed to rest in the bore g of said sheath or blade-holder, and at its opposite end said screw is provided with a head p, partly milled and partly squared, as illustrated, whereby it may be readily turned by `portion n, and theyare designed for the engagement of the sleeve-nut H, better illus- IOO trated in Fig. 5. This sleeve-nut is provided with a wing q, in which is formed a groove or seat r to receive the rear end of the blade, as shown in Fig. l, and when said nut is in engagement with the blade and the screw is turned the nut will be held against turning by the blade and with said blade will be moved forward. Said nut also serves in practice to hold the blade G to its place and prevent rearward movement of the same.

In the practice of our invention the parts are assembled as shown in Fig l-that is to say, the sheath or holder D is placed in the stock A, the blade is placed in said sheath or holder, and the sleeve-nut is placed in engagement with the blade, after which the blade is adjusted forwardly to the proper position by turning the feed-screw in the proper direction. When this has been done, the screws E are turned downwardly to secure the sheath or holder D in the stock and also to clamp said sheath or holder,which, on account of its peculiar construction, is more or less resilient upon the blade, so as to securely hold said blade in position. In case it is found that the cutting-blade is not presented at the proper angle to the axis of the lathe and the article to be cut, it is simply necessary, in order to get a square cutting-surface, to turn the screws f, so as to slightly move the sheath or holder D and consequently the blade laterally. After the blade has been adjusted to and secured in its proper position and the piece of metal to be cutis fixed in the chuck the blade G may be readily adjusted toward or from the chuck so as to cut at the desired distance therefrom by simply loosening the bindingscrew of the tool-post and moving the arm or shank a of the stock therein until the blade is in the desired position, when the screw may be tightened and the stock and shank adj ustably secured in position. When it is necessary to grind or sharpen the blade G, it may be taken out of' the holder by loosening the top screws E, which engage the depressions tin the sheath or holder and reversing the feed-screw F, and may be sharpened and then conveniently replaced in the exact position it occupied with respect to the chuck and the piece of metal held thereby. This may be accomplished, as will be observed, because it is not necessary to move the stock A or the sheath or holder D in order to remove the blade, and it is an important advantage, as is obvious.

It will be observed from the foregoing that with its many advantages my improved cutting-off tool is very simple and durable, and that it may be manufactured almost, if not quite, as cheaply as the tools at present in use.

Ve have in some respects speciiically described the construction and relative arrangement of the parts of our improved tool in order to impart a full, clear, and exact un derstanding of the same; but we do not desire to be understood as confining ourselves to such construction and` arrangement, as we reserve the right to make in practice such changes or modifications as fairly fall Within the scope of our invention.

Having described our invention, what we claim, and desire to secure by Letters Patent, 1s

l. In a cutting off tool, the combination of a stock having a recess in one of its sides, a sheath or guide arranged in said recess, a blade carried by the sheath or guide, and a screw extending transversely through the inner wall of the recess in the stock and bearing at its inner end against the inner side of the sheath or guide and adapted to adjust said sheath or guide and the blade therein laterally or in the direction of the open side of the recess in the stock, substantially as specied.

2. In a cutting off tool, the combination of a stock having a recess in one of its sides, a sheath or guide arranged in the recess of the stock, a blade arranged in the sheath or guide means for feeding the blade into the work, a screw taking through one of the walls of the recess in the stock and bearing against the sheath or guide and adapted to secure it in the stock and clamp it upon the blade, and a screw extending transversely through the inner wall of the recess in the stock and bearing at its inner end against the sheath or guide and adapted to adjust said sheath or guide and the blade therein laterally or in the direction of the open side of the recess in the stock, substantially as specied.

3. In a cutting oft` tool, the combination of a sheath or guide formed in one piece and having a longitudinal bore, the wall of which is slotted throughout its length and also having a recess in one of its sides communicating with the slot in its bore, a blade arranged in said recess of the sheath or holder, and a suitable means for clamping the sheath or holder on the blade, substantially as and for the purpose specied.

4. In a cutting off tool, the combination of a stock, a sheath or holder arranged in the stock and having a longitudinal smooth bore, a blade carried by the sheath or holder, a suitable means for securing the sheath or holder in the stock and clamping it on the blade, a feed screw having a plain portion j ournaled in and extending through the smooth bore of the Asheath or guide and also having an enlargement for engaging the sheath or guide and a nut arranged on the threaded portion of said screw and engaging the end of the blade, substantially as and for the purpose set forth.

5. In avcutting off tool, the combination of a stock having a recess in one of its sides and also having a shank or arm extending from its opposite side and adapted to be arranged and adjustably secured in a tool post,

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a sheath or guide arranged in the recess of the stock and having a longitudinal bore and also having a recess in one of its sides, a blade arranged in the recess of the sheath or 5 guide, a screw taking through the stock and engaging the sheath or guide and adapted to clamp it on the blade, a screw taking through the stock and engaging the sheath or guide and adapted to adjust it and the blade therein Io laterally, a feed screw arranged in the bore of 

